Question

5
trilobites are sea creatures that lived about 500 million years ago. their fossils have been found in rock strata all over the world, as shown in the map above. what can you conclude from this information?
a trilobites are found in rock strata above more recent fossils
b much of the world was covered with water 500 million years ago
c trilobites were the only life forms on earth 500 million years ago
d the world’s climate has remained constant for 500 million years

Explanation:

Trilobites were sea creatures, so their fossils found on present-day landmasses (marked on the map) indicate those areas were underwater 500 million years ago, meaning much of the world was covered by water then. Option A is wrong because trilobites are ancient fossils, not in recent rock strata. Option C is incorrect as there were other life forms at that time. Option D is false because the climate has changed drastically over 500 million years.

Answer:

B. Much of the world was covered with water 500 million years ago